Immunogenetics. Chromatin state dynamics during blood formation.

Immunogenetics. Chromatin state dynamics during blood formation.
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DOI:
10.1126/science.1256271
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发表时间:
2014-08-22
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Amit I
Amit I
中科院分区:
其他
文献类型:
--
作者:
Lara-Astiaso D;Weiner A;Lorenzo-Vivas E;Zaretsky I;Jaitin DA;David E;Keren-Shaul H;Mildner A;Winter D;Jung S;Friedman N;Amit I

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Chromatin modifications are crucial for development, yet little is known about their dynamics during differentiation. Hematopoiesis provides a well-defined model to study chromatin state dynamics, however technical limitations impede profiling of homogeneous differentiation intermediates. We developed a high sensitivity indexing-first chromatin immunoprecipitation approach (iChIP) to profile the dynamics of four chromatin modifications across 16 stages of hematopoietic differentiation. We identify 48,415 enhancer regions and characterize their dynamics. We find that lineage commitment involves de novo establishment of 17,035 lineage-specific enhancers. These enhancer repertoire expansions foreshadow transcriptional programs in differentiated cells. Combining our enhancer catalog with gene expression profiles, we elucidate the transcription factor network controlling chromatin dynamics and lineage specification in hematopoiesis. Together, our results provide a comprehensive model of chromatin dynamics during development.
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